Version 0.14 released

This is a fairly minor feature release. The major changes are the pattern
matching ACL support, the support for running directly as a Windows service and
the change to the network code to attempt to send packets immediately. The
Windows binary is now supplied as an installer rather than a zip file.

Add support for matching ACLs based on client id and username.

Add a Windows installer file (NSIS based).

Add native support for running the broker as a Windows service. This is the
default when installed using the new installer.

Fix client count for listeners. When clients disconnect, decrement the
count. Allow max_connections to work again.

Attempt to send all packets immediately upon being queued. This will result
in more immediate network communication in many cases.